RDF::Trine::Node::Literal - RDF Node class for literals
This document describes RDF::Trine::Node::Literal version 1.019
Beyond the methods documented below, this class inherits methods from the
the RDF::Trine::Node manpage class.
- new ( $string, $lang, $datatype, $canonical_flag )
-
Returns a new Literal structure.
- literal_value
-
Returns the string value of the literal.
- literal_value_language
-
Returns the language tag of the ltieral.
- literal_datatype
-
Returns the datatype of the literal.
- value
-
Returns the literal value.
- sse
-
Returns the SSE string for this literal.
- as_string
-
Returns a string representation of the node.
- as_ntriples
-
Returns the node in a string form suitable for NTriples serialization.
- type
-
Returns the type string of this node.
- has_language
-
Returns true if this literal is language-tagged, false otherwise.
- has_datatype
-
Returns true if this literal is datatyped, false otherwise.
- equal ( $node )
-
Returns true if the two nodes are equal, false otherwise.
- canonicalize
-
Returns a new literal node object whose value is in canonical form (where applicable).
- canonicalize_literal_value ( $string, $datatype, $warn )
-
If
$datatype is a recognized datatype, returns the canonical lexical
representation of the value $string. Otherwise returns $string.
Currently, xsd:integer, xsd:decimal, and xsd:boolean are canonicalized.
Additionally, invalid lexical forms for xsd:float, xsd:double, and xsd:dateTime
will trigger a warning.
- is_canonical_lexical_form
-
- is_valid_lexical_form
-
Returns true if the node is of a recognized datatype and has a valid lexical form
for that datatype. If the lexical form is invalid, returns false. If the datatype
is unrecognized, returns zero-but-true.
- is_numeric_type
-
Returns true if the literal is a known (xsd) numeric type.
- numeric_value
-
Returns the numeric value of the literal (even if the literal isn't a known numeric type.
Please report any bugs or feature requests to through the GitHub web interface
at https://github.com/kasei/perlrdf/issues.
Gregory Todd Williams <gwilliams@cpan.org>
Copyright (c) 2006-2012 Gregory Todd Williams. This
program is free software; you can redistribute it and/or modify it under
the same terms as Perl itself.
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